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2. 发明公开

EP1625988A1 NEGATIVE PRESSURE BOOSTER 有权
标题翻译： UNTERDRUCKVERSTÄRKER
公开(公告)号：EP1625988A1
公开(公告)日：2006-02-15
申请号：EP04730041.3
申请日：2004-04-28
申请人： Bosch Corporation
发明人： MORI, Yasushi, C/O Bosch Automotive Systems Corp.
IPC分类号： B60T13/52
CPC分类号： B60T8/3275 , B60T13/57
摘要： In a negative pressure booster (1) of the present invention, at the time of performing a usual braking operation in a low deceleration region, a force attributed to the pressure difference between pressures applied to a variable pressure chamber and a constant pressure chamber is equal to or smaller than a sum of a set spring load of a spring (31) and a spring load of a valve spring (18). Accordingly, a vacuum valve seat member (27) is not moved and the usual braking operation is performed at a small servo ratio. Further, during the usual braking operation in an intermediate deceleration region, the force attributed to the pressure difference is larger than the sum of the above-mentioned spring loads and hence, the vacuum valve seat member (27) moves rearwardly while pushing a valve element (12). Accordingly, a valve opening quantity of an atmospheric valve (16) is increased while shortening a pedal stroke and hence, a braking operation for intermediate deceleration is performed at a larger servo ratio, whereby brake manipulation feeling can be enhanced.
摘要翻译：在本发明的负压增压器（1）中，在低速减速区域进行通常的制动动作时，施加于可变压力室和恒压室的压力之间的压差相等的力相等小于或等于弹簧（31）的设定弹簧载荷和阀弹簧（18）的弹簧载荷的总和。因此，真空阀座构件（27）不移动，并且以小的伺服比进行通常的制动操作。此外，在中间减速区域中的通常的制动操作期间，由于压力差导致的力大于上述弹簧负载的总和，因此真空阀座构件（27）向后移动，同时推动阀元件（12）。因此，在缩短踏板行程的同时，大气阀（16）的开阀量增加，因此以更大的伺服比执行中间减速的制动操作，从而可以提高制动操作感。

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